Julius begtrup



(No Model.)

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NITEDJ STATES PATENT OFFICE.

JULIUS BEGTRUP, OF RIDGWAY, PENNSYLVANIA, ASSIGNOR TO JAMES H. MOEWEN, OF SAME PLACE.

STEAM--ENGYINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 536,505, dated March 26, 1895.

Application filed January 4, 1893. serin ro. 457,246. (No model.) Patentadin Englan January 5, 1894,1im291, and in Canada February 8, 1894,1lo. 45,268.

To all whom it may concern:

Be it known that I, JULIUS BEGTRUP, a subject of the King of Denmark, residing at Ridgway, Elk county, Pennsylvania, have invented certain new and useful Improvements in Steam-Engine Governors, (Case A,) of which the following is a specification.

Foreign patents have been taken out in Great Britain January 5, 1894,, No. 291, and in Canada February 8, 1894, No. 45,268, for an invention relating to the subject matter of this specification.

This invention pertains to improvements in governors designed for regulating the speed of steam engines, &c., and relates particularly to that class of governors in which the governor is carried directly by the shaft of the engine and operating to modify the position of the eccentric, this type of governors being known as shaft governors.

My present improvements will be readily .understood from the following description taken in connection with the accompanying drawings, in which- Figure 1, is a face view or elevation of a governor exemplifying my present invention; Fig. 2, a horizontal section of the same; Fig. 3, a vertical section through the cylinder of the dash-pot; and Fig. 4, a side elevation,part vertical section, at intermediate portions of the governor arm, illustrating the construction as modified by so enlarging the eccentric that the engine shaft may pass through it.

In the drawings:-A, indicates the engine shaft; B, a Wheel fast thereon, which wheel, so far as the governor is concerned,is a mere carrier for the governor; C, a pivot carried by the wheel eccentric to and parallel with the axis of the shaft; D, an arm having its intermediate portion journaled at the pivot C, this arm extending across the wheel in a substantially diametrical line, so far as mere form of arm is concerned; E, a weight at one end of this arm; F, a weight at the other end of the arm; G, the eccentric,'mounted upon the arm, in proper relationship to the axis of'shaft A, this eccentric being of any size found expedient, Figs. 1 and 2 showing it as small and forming a. mere eccentric pin, while Fig. 4

shows it so much enlarged that it may have an open center sufficiently large to permit of the extension of shaft A axially through the plane of the arm and eccentric; H, a spring acting between an attaching point on the wheel and the arm and tending to resist the rocking of the arm in one direction of motion upon its pivot C; J, a dash-pot cylinder formed the line of the piston-rod; L,a bell-crank pivoted to this pivot, one arm of this bell-crank pot to which it is rigidly attached, the other arm being formed with a weight; M, a circle of anti-friction rolls at the bearing of arm D upon pivot C, forming: at that point an antifriction roller bearing; N, a pair of limiting stops carried by the wheel; and O, a strike carried by the arm D and adapted to be arrested by stops N at limits of desired rocking motion of arm D upon its pivot, this strike being preferably provided with buifers to ease the jar at times of engagement.

Disregard, for the present, weight E. As

the governor revolves in the direction of the arrowof Fig. 1, centrifugal force tends to move weight F, and the mass of,the arm D, farther from the axis of shaftA, and the tension of spring H resists this motion. The center of gravity of the arm and weight are outwardly beyond the line cutting the centers of shaft A and pivot C. Consequently, centrifugal force, due to increase in speed, will rock the arm and strain the spring and move the cocentric in an arc across the shaft, thus shifting the eccentric to a position suited to effect a reduction of speed. The arm can rock no farther than permitted by the appropriate one of stops N. The piston of the dash-pot is to beloose enough to permit of leakage of air past it. Consequently the dash-pot will resits 6X. tremely sudden orjerky movements of the arm upon its pivot, but will permit more deliberately applied forces to move the arm. As the governor revolves,.centrifugal force acts on the piston of the dash-pot and seeks to press it forcibly against the outer portion of its cylaxis of shaft A. Assume, now, that this com- 'inder, thus tending to produce undesired friction and wear of the cylinder and piston; but, in the present construction, the piston is counterbalanced by means of the weight upon the bell-crank L. The same centrifugal force that tends to move the piston outwardly tends also to move its rigidly attached counter weight outwardly, and, the parts being designed in proper balance, the centrifugal effect is nil. eight E upon arm F tends to balance the arm upon its pivot C and it also gives to the arm structure a virtual balancing upon the center of rotation of the governor, upon the bined structure is in rotation at certain speed, and assume that the speed of the wheel is suddenly increased. The other member of the pair, the arm, by its inertia, would seek to maintain the former speed and lag behind the wheel; and in the present case it does so, the lagging motion not however taking place upon the axis of shaft A but upon the pivot C. The effect of this lagging motion is to move the eccentric in the same direction as it would be moved under the action of centrifugal force due to increased speed. Therefore, assuming that there is no motion of the governor arm due to centrifugal force, it will be seen that governing action takes place by reason of the inertia of the arm structure, that arm structure seeking to lag if the Wheel takes on accelerated velocity, and seeking to maintain its former speed if the wheel takes on retarded velocity, the arm structure therefore forming an inertia weight, with its mass distributed at each side of its pivot, which lags behind the quickening wheel and stands ahead of the lagging wheel, its change of position with reference to the wheel producing appropriate action upon the eccentric; and it will furthermore become apparent that the inertia weight, having thus shifted with reference to the wheel by reason of its inertia, may assume an infinite variety of positions with ref erence to the wheel, not tending by its inertia to return to any particular position by reason of the wheel having returned to normal speed.

The arm structure need not necessarily have the arm and weight form indicated. It may be given any desired form, it only being necessary that it shall be pivoted eccentric to the axis of rotation of the governor and that its center of gravity preferably lie to one side of a line cutting its pivot and the axis of rotation of the governor.

I claim as my invention 1. In an engine governor, the combination, substantially as set forth, of a rotary carrier, a pivot carried thereby eccentric to the center of rotation of the carrier, an inertia weight mounted for oscillation at said pivot, antifriction rolls at the engagement of said inertia weight with said pivot,and an adjustable valve-gear part, as a shifting eccentric, connected with said inertia-weight.

2. In an engine governor, the combination,

substantially as set forth, of a rotary carrier, a pivot carried thereby eccentric to the center of rotation of the governor, an inertia weight and eccentric rigidly united and mounted for oscillationon said pivot, the mass of said combined inertia weight and eccentric being disposed on both sides of said pivot and the center of gravity thereof being located to one side of a line cutting said pivot and the center of rotation of the carrier, so that said center of gravity shall not within its proper limits of movement pass to the other side of said line.

3. In an engine governor, the combination, substantially as set forth, of a rotary carrier, a pivot carried thereby eccentric to the center of rotation of the carrier an inertia weight mounted for oscillation on said pivot and having its mass distributed on both sides of said pivot and having its center of gravity located to one side of a line cutting said pivot and the center of rotation of the carrier at such distance that it shall not, within its proper limits of motion, pass to the other side of said line, and an adjustable valve-gear part, as a shifting eccentric,connected with said inertiaweight.

4. In an engine governor, the combination, substantially as set forth, of a rotary carrier, a pivot carried thereby eccentric to the center of rotation of the carrier, and an integrally formed inertia weight and centrifugal weight mounted for oscillation on said pivot and having its mass distributed on both sides of said pivot.

5. In an engine governor, the combination, substantially as set forth, of a rotary carrier, a pivot carried thereby eccentric to the center of rotation of the carrier, and a rigidly united inertia weight and centrifugal weight mounted for oscillation on said pivot and having its mass distributed on both sides of said pivdt. I 1

6. In an engine governor, the combination, substantially as set forth, of a rotary carrier, a pivot carried thereby eccentric to the center of rotation of the carrier, and an inertia weight and centrifugal weight pivoted in common to said pivot, said inertia weight having its mass distributed on both sides of said pivot.

7. In an engine governor, the combination, substantially as set forth, of a rotary carrier, an adjustable valvegear part, as a shifting eccentric, mounted thereon to move and serve in effecting regulation, a dash-pot formed of the piston portion and the cylinder portion arranged to steady the movement of said valvegear part, said dash-pot being carried by said carriage and disposed with its axis as the chord of an arc struck from the center of rotation of the carrier, a pivot carried by said carrier near said dashpot, and a lever mounted upon said last mentioned pivot and having one of its arms connected with one of said dash-pot portions and having its other rier, a pivot carried by said carrier near said cylinder, and alever mounted upon said pivot and having one end attached rigidly to the piston-rod of said dash-pot and having its op- I 5 tposite end provided with a weight to counterbalance the action of centrifugal force upon the piston of the dash-pot. JULIUS BEGTRUP.

Witnesses:

S. A. ROTE, A. L. BELL. 

